Radio Receiver Power Source Circuit [09/2017 - ]: Procedure

1. Disconnect the I152 and I153 radio receiver assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Radio Receiver Assembly)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I152-1 (GND1) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I152-4 (+B1) - I152-1 (GND1)	Always	11 to 14 V
   I152-15 (ACC1) - I152-1 (GND1)	Engine switch on (ACC)	11 to 14 V
   I153-19 (IG) - I152-1 (GND1)	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2017 - 10/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR